hagman



Patented N ov. 11, 1919.

2 SHEETS-SHEET I.

T. HAGMAN. SAFETY CLUTCH.

AFPLICAION FILED JULY23 |91?.

T.- HAGMAN.

SAFETY CLUTCH.

RPPLICATION FILED lULY23 |917.

Patented Nov. 11, 1919.-.

2 SHEETS-SHEET 2.

THEODORHAGTMAN, or sYRAcUsE, NEW YORK.

sieri-:vw:-CLUTCH.

Spcxzcation of l-Letters Patent.

Patented Nawal, 1919.

Application inea LJuiyzs, 1917.1 serial No. 182,173.

To all whom t maz/'concern' A Be it known that Ll'Ti-Ino'non HAGMAN, 'a citizen of the United States, anda resident of Syracuse, inthe county of .Onondaga and State of New York, have inventedalcertain new and useful Safety-Clutch, of which the following is a specilication.

This invention 'relates to safety clutches of the type shownin my Patent No. '964,77 4, July 19, .-1910, and "has for its objectfa particularlysimple and efficient mechanisn'i for operating the clutch at Will "to unclutch the saine, and for lresetting the clutch and its operating' mechanism; andthe 'invention consists in the combinations -and 'constructions hereinafterset forth and claimed.

In describing this invention,referencefis had to the accompanying dr Wings in which like characters designate corresponding parts in all the views. p

Figure 1 is a longitudinal sectional view, partly in elevation, of my safetyclutch and portions of the resetting means.

Figs. 2 and 3 are sectional views respectively on lines 2 2, 3 3, FigQlL Fig. 4 is a fragmentary detail vietvv'taken on line 4 4, Fig. 2.

F ig. 5 is an elevation looking upwardly in Fig 4, parts being omitted. x y Y Fig. 6 is a sectional view -on the plane of line 6 6, Fig. 5. l

Figs. 7 and 8 are respectivelv a plan and isometric view of parts seen in Figs. 4, 5 and 6, parts being omitted in Fig. 8;

This vinvention comprises generally driving and driven elements, a safety clutch coupling said elements together, mechanism whereby said elements may be uncoupled at Will by the rotative Ymovement of said elements, manual means for resetting the clutch, and manual means 'for resetting'said mechanism.

l and 2 are respectively driving and driven elements arranged in axial alinement, these elements and the clutch `construction being substantially the same as that shown in my patent referred to. The vdriving element comprises a pulley 3 mounted on the drivenelement 2," here shownas a shaft? supported in suitable hangers 4. -The clutch comprises driving and driven sections associated respectively withv the driving and driven elements and Vshiftable members connecting sections, 5 is 'a dr.ving section loosely mounted on the shaft 2 and bolted to "the pulley 3, the section 5 being formed with an axial socket at one end which provides a sleeve 6. 7 is the driven section Awhich includes an enlargement or collar S fixed on Athe shaft 2 and located within the sleeve 6. The` section 5 and its sleeve 6, and the section 7are provided With length- Wise radially alined keyways 9 and 10, portions of the keyvvays 9 in the sleeve 6 eX- tendin'g through the sleeve. y y

l`1arethe members connecting the clutch sectionsI and are here shown as keys pivoted `in the keywavs 9 uin the driving clutch section 5 4and having portions movable into in the keyvvays 9 and 10, andthe means for moving Athem out of the keyWays to uncon- .ple the elements vl, 2 or unclutch the safety clutch, comprises a cam 13 loosely mounted on the shaft 2, and having points or teeth 14 movable against the inner sides of the projecting` ends of the keys 11, in order to forcethe keys outwardly or radially on their 'pivots out-of the keyways 9 and 10. The

`c`a1n j.13 is here shown asrprovided with two diametrically .opposite teeth 14 having rounding or cam surfaces on one side and la'bruptshoulders 15 on the other side Vand with tvvo additional teeth 16 vdiametrically opposite, but not Wide enough to engage the 'ends of `the keys -11, but having theshouh ders 15. vSaid cam 13 is here shown as Ipressed axially againstthe col-lar 8 and the end of the sleeve "6, `by a spring 17 coiled about the shafft Q'and located in a discoidal 'partor casing 18 mounted adjacent the cam 'lf3 and held in position by a collar 20 suitably keyed to the shaft as by a set screw 2l. The periphery ofthe casing is arranged at one side of the'path of the shoulders 15 and is of the'same vor greater radius than said shoulders 15 and forms a rest for theholdingmember when the holding member is in its idleor inoperative position.

V'23designaltes the holdingmeinber which is 'here-shown fas a spring pressed "p lunger mowl.mallyQ-in.operative position and moved out able radially relatively to theV shaft 2 in a suitable guide24 provided in a carrier 25 which is movable in a direction axially of the shaft 2, this carrier 25 being here v yA spring 27 normally ltends to move the car-j '20 shown `as a lever pivoted at26 at a point gagementiwith one of the abrupt shoulders ofthe cam'1'3, and thus retard the'inovementfofthe cam so that the continued rotation ofthe driving' and driven' elements causes ythe inclinedsurfaces of the teeth 1l of the Vcamtoforce the keys 11 outwardly.

rier to move theholding member 23 off the surface'of the casing into the path of Y theshoulders 15 of the cam 13, andV thus hold the cam fromrotation so that the keys l' 1l are shifted outwardly to uncouple the clutch.

VThe carrier 25 is provided with' a handle i .i ,32- at Iits lower end by which it' can be manually reset. One of the coacting surfaces ofthe discoidal1member18 and the holding member 23 isfinclined to depress or vmove outwardly radially theV holdingv member 23 during the resetting movement i of the carrier. As-'here shown, the holding member 23 is Vfor-med with an inclined or ratchet surface 23a. Upon the resetting movement ofthe carrier 25, the spring pressed plunger 23is forced out vof engagement with theshoulders 15 of the cam 13 and rests upon the casing 18. Overthrow igTheholding member 23 is normally in l its inoperative position,and the meansvfor controllingv the movement of the same,r into its ,operative Vpositionby the carrier in- Y cliides an electromagnet and detent Ymechasff"nisniopera'ted byY the electromagnet to krelease'the member23and its carrier`25 and Y permit V the carrier 25 to be moved by its spring 27, the detent mechanismbeingjnorofVv itsoperative position by the magnet i fwhenienergized'. `The spring 27 is a `coiled f extension spring whichis connected at one endv to thecarrierf25and at itsother end to any "[iXed point, the spring' being normally,under tension so that 'when the holdl ing member 23L is withdrawnlthe spring is free to contract and `shift the carrierY 25.

34 designates 'the' electromagnet supportedS by a frame 35. 36 is the armature for the magnet. The detent mechanismV comi Vprises aA member 37 p ivoted at 38to the frameV 35 and carrying a roller 39 which actsupon the stein of the holdingmember .at diametrically opposite points.

23 and a latch or latches 40 pivoted at 41 to said frame 35 and normally engaged with the member 37 and being held in engagement therewith by the armature 36 when the armature is in its inoperative posimember 37, the latches 40 have notches 42 which receive shoulders or pins 43 at oppositev ends of the member 37 as seen in Fig. 5, and holding the member 37 from movement by the spring 27. Said member 37 is also acted upon by a suitable returning spring 44 which acts to return the member 37 to its normal position during the resetting operation when said member 37 is relieved ofthe action of the spring 27.

In operation, when the circuit through the magnetis closed, the armature is attracted permitting the latches V40 to be moved into the position shown in Fig. 4, thus moving the notches 42 away from the shoulders 43 so that the spring 27 is free to move the carrier to shift the plunger from its normal position intovthepath of the teeth l5 of the cam 13.

stituted for that shown and described. of the lever 25 'beyond' its starting position Y is prevented Aby a suitable stop 25a,V

resetti-ng `the clutch, includes a collar 4G encircling the driving section and movable lengthwise thereof over the keys 11 in order to depress the keys llradially into thekeyways 9, 10 when the keyways 9 and 10 come into radial alinement. This collar 4G is actuated by a suitable lever 47 pivol'ed at 48 to a point above the shaft 2 and has a bifurcated portion encircling the clutch section 5 and connected thereto by pins 49 The resetting lever is returned to its normal position by a spring 50.

The keys 11 are yieldingly held in their operative or inoperative positions by spring pressed plungers 51 located at the bottoms of the keyways 9 in the parts 5, and coacting with notches in the hubs 52 of the keys 11. Preferably as seen in Fig. 3 the walls of the keyways 10 are lower on the advance sides of the keyways, with respect to the direction of rotation of the shaft 2 and collar 8, and thesurfaces 8a approaching the lower sides of the keyways are of different curve or centers from the surfaces approaching `the high sides of the keyways. Hence the ykeys -can be gradually reset When the collar e7 is operated.

In operation, the circuit which controls the electromagnet 34, is provided With buttons at suitable points as-on the hand levers of various lmachines or in rany other convenient locations, and when, as -in the case of accident, it is necessary -for quick stopping of a machine, any one of the buttons in the circuit-can `be pressed, thus energizing the magnet 34 which releases the carrier '295 so that .it can be y.operated by its spring 27, to move the lholding `member'Q?) into the `path 'of a shoulder 15V-of the cam 13 as before described, and effect the uncoupling of the clutch.

When the contingency -requiring the quick stopping of machineryceases to exist, the

4parts can be quickly reset by operating the VAhandles 32 and L7 of the carrier and of the clutch resetting lever. i

This invention is particularly advantageous in 'that litisyreadily operable and can clutch, Vincluding -a shifting member normally :rotatable With said elements, and having fa shoullder, a holding `member normally arranged fat one side of the path of the shoulder, Va `carrier for said'holding member movable 4i-n a direction axially of the driving.

and driven elements for carrying `the holding member Ainto the path of the shoulder, and means for controlling the movement of the carrier, substantially -as and for the purpose specified.

2. The combination of rota-table driving and driven elements arranged in axial alinement, a clutch coupling said members together, means operable by the movement of the driving element for uncoupling the clutch including a shifting member normally rotatable With said elements and having a shoulder, a discoidal member mounted adjacent the shifting member and having a peripheral annular surface at one side of the path of said shoulder, a holding member normally engaging said surface, a carrier for said ineinbei' movable in a direction axially of the driving and driven elements for carrying the holding member into the path of the shoulder, and means for controlling the movement of the carrier in one direction, the carrier being manually movable in the opposite direction, substantially as and for the purpose set forth.

3. The combination of rotatable driving and driven elements arranged in axial alineinent, clutch for coupling said elements together, imeans operable bythe movement of the driving element for lvuncoup'ling the yclutch including la shifting member normally rotatable With said-elementsand havinga shoulder, a discoidal part mounted adjacent the shifting `member and having a peripheral annular surfaceat one side of the :path of .said shoulder, a holding member ynormally engaging said surface, a carrier for said `member movable in adirection axially ofthe driving and driven elements for carrying the holding member linto the path of the shoulder, and electromagnetic means for controlling the movement of the carrier in one direction, substantially as and forthe purpose described.

4. The combination of rotatable driving andvdrivenelements arranged in axial aline- "ment, a clutch for coupling said elements together, `means operable by the movement of the driving velement for -uncoupling the clutch including a shiftable member normally rotatable lwith saidelements and having a shouldena diseoidalipart adjacent the shifting member and having a peripheral annular surface at one side of the path of, andof greater radius than, said shoulder, a kholding member normally engaging said surface, a carrier for said member movable 4in. a :direction axially of the driving Iand driven elements for carrying the holding `member Vinto the path of the shoulder, and means lfor controlling the movement ofthe carrier, :substantially as iand for the purpose specified. l

5. The combination of rotatable driving and driven elements arranged inaxial aline- `ment, a clutch for couplingsaid relements toigether, means operable by the movement of the vdriving `element Ifor uncoupling the clutch including a shifting member normally retaftable Withsaid elements and having a vshouldei-a discoidal part'ad-j acent the shifting member and having a peripheral annular surface -at one `side of the path of and of greater radius than saidA shoulder, a holdin-g member normally engaging said surface, a carrier for said member movable in direction axially `.of the driving and driven elements for carrying the holding member into the path of the shoulder, one of the coacting surfaces of the holding member and the discoidal part being a cam surface serving to move the holding member radially outwardly out 'of its holding position during movement of the carrier in a retrograde direction, and means for controlling the movement of the carrier, substantialh7 as and for the purpose set forth.

6. The combination with rotatable driving' and driven elements, of a clutch Coupling said elements together including driving and driven sections fixed respectively to said elements and a radially movable key carried by the driving section and movable rloutwardly from its operative position, a cam lnormally rotatable with said sectionsand arranged to coact with the key tomove the wvai'clly', vmeans operable at willv for controlling the,move'ment offthe cam holding means, and Vmanual means including apart :'1'0

movable lengthwise ofthe vdriving element yand arranged to engage the key to reset the same, and manual means for kresetting the f cam holding means 'in its normal position,

' substantially scribed.V Y y 7 The combination withV rotatable, driving and driveny elements, of a clutch coupling said elementsv together includingdriving and'driven sections fixed respectively to said elements, andf a radially movable key carried by the driving section, and movable Y outwardlyfrom itsl opera-tive position, a cam normally rotatable l with said sections and arrangedto coact with the key to-move the same outwardly, means operable at will for f vholding the cam from movement `whereby 'rotation of the elements and sections causes the cam to move thekey outwardly, electromagnetic means operable at will for kcontrolling the movement of the cam holding means in to operative position, manual means for resetting the key including a. part mova'ble lengthwise of thedriving 'section to engage vand move the key, and manual means Yfor moving the cam holding means to its normal position, substantially as and for the purpose specified.

8;The combination ,with rotatable driv ing and driven'V elements arranged in axial alinement',l a clutch connecting said elements .includingV driving and driven sections fixed Yrespectivelyfto said elements, the driven clutch-,section having a portion located within'the drivingsection, and said sections being-formed iwith keyways arranged to come into radial alinement, a key extending lengthwise ,of the driving element and'into .asv and fortlie purpose de-l -the keyways of both of said elements, a cam loosely mounted on thedriven element adjacent the end of the drivenclutch section, and Vbeing normally rotatable therewith, and

having a stop shoulder and an inclined surface for engaging the key to force the saine outwardly when the cam is held from rotation, a disk mounted on the driven element adjacentthe camy and having its eripliery of as great a radius as the radius o the cam, a carrier movable in a direction lengthwise of the driven element, a spring pressed holding member supported'by the carrier, and movable radially relatively'to the drivenelement and normally engaging the periphery ofthe disk and movable into the path of the shoulder of the cam, a spring tending to move the carrier in one direction to carry the holding member into the path of the shoulder, the carrier being movable manually in the opposite direction, electromagnetic means for controlling the movement of the carrier, a noiirotatable collar movable lengthwise of the driving clutch section and coacting with the key to movethe same radially inwardly and reset the same, and manual means for moving the ring in one direction to reset the key, substantially as and for the purpose set forth.

9. The combination with rotatable driving and driven elements, of a clutch couplin said nelements together including driving and driven sections fixed respectively to said elements,1and a radiallymovable key carried by Jthe driving section and movable outwardly from its operative position, means for moving the key outwardly, and means for resetting the key including a collar encircling the driving clutch section and movable lengthwise thereof, substantially as and fortlie purpose set forth.

YIn testimony whereof, I have hereunto signed my name, at Syracuse, in the county of Onondaga, and State of New York, this th day of July, 1917 .i

THEODOR HAGMAN.

Copies e'ijt'liis patent'rma'ycbe obtained for ve cents each, by addressing the' Commissioner of Patents,

Washington, D. C. 

